How much energy must be removed from 2 grams of water at 0°C to convert the water to ice?

periodic-table

#1

How much energy must be removed from 2 grams of water at 0°C to convert the water to ice? The latent heat of fusion of water can be f ound on the back of your periodic table.

Answer:

So, the latent heat of fusion for water is 334 J/g or 334 kJ/kg - but since we have 2 grams of water, we should use the J/g measurement. So if we have 2 grams of water, and we want to convert it to ice, we need 2g * 334 J/g or 668 Joules of energy to convert the 2 grams of water at zero degrees celsius to ice.